Preparation method and application of spherical nano bismuth oxide photocatalyst
A photocatalyst, bismuth oxide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low solar energy utilization, low quantum efficiency, and catalytic activity. Low and other problems, to achieve the effect of high solar energy utilization, high quantum efficiency and uniform particle size
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[0015] Example 1
[0016] Under stirring conditions, add 1.5 mmol of bismuth nitrate pentahydrate to 35 mL of water, and then add 4.5 mmol of sodium gluconate, stir thoroughly, and adjust the pH of the solution to 10 with sodium hydroxide to obtain a mixed solution. The mixed solution was put into an autoclave, sealed, and kept at 120°C for 18 hours for hydrothermal reaction. After the reaction, the autoclave was cooled to room temperature, the solution in the autoclave was centrifuged to collect the precipitate, washed with distilled water, dried at 50°C for 6 hours, and roasted at 400°C for 5 hours to obtain material 1. X-ray electron diffraction image from material 1 ( figure 1 ) It can be seen that material 1 is pure bismuth oxide. From the electron microscope topography of material 1 ( figure 2 ) It can be seen that the bismuth oxide is a nanosphere with an average diameter of about 200 nm.
Example Embodiment
[0017] Example 2
[0018] Under stirring conditions, add 1.5 mmol of bismuth nitrate pentahydrate to 35 mL of water, and then add 6 mmol of sodium gluconate, stir thoroughly, and adjust the pH of the solution to 11 with sodium hydroxide to obtain a mixed solution. The mixed solution was put into an autoclave, sealed, and kept at 180°C for 24 hours to conduct a hydrothermal reaction. After the reaction, the autoclave was cooled to room temperature, the solution in the autoclave was centrifuged to collect the precipitate, washed with distilled water, dried at 60°C for 4 hours, and then calcined at 500°C for 3 hours to obtain material 2. It can be seen from the X-ray electron diffraction image of material 2 that material 2 is a pure phase of bismuth oxide. From the electron microscope topography of material 2, it can be seen that the bismuth oxide is a nanosphere with an average diameter of about 200 nm.
Example Embodiment
[0019] Example 3
[0020] Under stirring conditions, add 1.5 mmol of bismuth nitrate pentahydrate to 35 mL of water, and then add 7.5 mmol of sodium gluconate, stir well, and adjust the pH of the solution to 13 with sodium hydroxide to obtain a mixed solution. The mixed solution was put into an autoclave, sealed, and kept at 150°C for 22 hours to conduct a hydrothermal reaction. After the reaction, the autoclave was cooled to room temperature, the solution in the autoclave was centrifuged to collect the precipitate, washed with distilled water, dried at 70°C for 3 hours, and then calcined at 600°C for 1 hour to obtain material 3. It can be seen from the X-ray electron diffraction image of material 3 that material 3 is pure phase bismuth oxide. From the electron microscope topography of material 3, it can be seen that the bismuth oxide is a nanosphere with an average diameter of about 200 nm.
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